W
W. Yu
Researcher at McMaster University
Publications - 6
Citations - 482
W. Yu is an academic researcher from McMaster University. The author has contributed to research in topics: Superconductivity & Engineering. The author has an hindex of 5, co-authored 5 publications receiving 465 citations. Previous affiliations of W. Yu include Renmin University of China.
Papers
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Journal ArticleDOI
Absence of superconductivity in single-phase CaFe 2 As 2 under hydrostatic pressure
W. Yu,W. Yu,Adam A. Aczel,Travis Williams,S.L. Bud'ko,Ni Ni,P. C. Canfield,Graeme Luke,Graeme Luke +8 more
TL;DR: In this paper, high-pressure susceptibility and transport studies were performed on CaFe and helium as the pressure medium, and the signatures of the transitions to the low-temperature orthorhombic and collapsed tetragonal phases remained exceptionally sharp, and no signature of bulk superconductivity was found under hydrostatic conditions.
Journal ArticleDOI
Superconducting state coexisting with a phase-separated static magnetic order in (Ba,K)Fe2As2, (Sr,Na)Fe2As2, and CaFe2As2
Tatsuo Goko,Tatsuo Goko,Tatsuo Goko,Adam A. Aczel,Elisa Baggio-Saitovitch,S.L. Bud'ko,P. C. Canfield,Jeremy P. Carlo,G. F. Chen,Pengcheng Dai,A. C. Hamann,Wen Hu,Hiroshi Kageyama,Graeme Luke,J. L. Luo,B. Nachumi,N. Ni,Dmitry Reznik,D. R. Sanchez-Candela,Andrei T. Savici,K. J. Sikes,N. L. Wang,Christopher R. Wiebe,Travis Williams,Takafumi Yamamoto,W. Yu,Yasutomo J. Uemura +26 more
TL;DR: By muon spin-relaxation measurements on single-crystal specimens, the authors showed that superconductivity coexists with a strong static magnetic order in a partial volume fraction.
Journal ArticleDOI
Structural, magnetic and superconducting phase transitions in CaFe2As2 under ambient and applied pressure
P. C. Canfield,S.L. Bud'ko,N. Ni,Andreas Kreyssig,Alan I. Goldman,Robert J. McQueeney,Milton S. Torikachvili,Dimitri N. Argyriou,Graeme Luke,W. Yu +9 more
TL;DR: In this paper, it was shown that CaFe 2 As 2 undergoes a first order phase transition from a high temperature, tetragonal phase to a low-temperature orthorhombic/antiferromagnetic phase upon cooling through T ǫ ∼ 0.35 GPa.
Journal ArticleDOI
Muon-spin-relaxation studies of magnetic order and superfluid density in antiferromagnetic NdFeAsO, BaFe 2 As 2 , and superconducting Ba 1-x K x Fe 2 As 2
Adam A. Aczel,Elisa Baggio-Saitovitch,S.L. Bud'ko,P. C. Canfield,Jeremy P. Carlo,G. F. Chen,Pengcheng Dai,Tatsuo Goko,Tatsuo Goko,Tatsuo Goko,W. Z. Hu,Graeme Luke,J. L. Luo,Ni Ni,D. R. Sanchez-Candela,Fazel Tafti,Nan Wang,Travis Williams,W. Yu,Yasutomo J. Uemura +19 more
TL;DR: In this paper, the structural and magnetic phase transitions in CeFeAsO(1-x)F(x) with fluorine doping have been studied and compared with other Fe-As tetrahedron-based superconductors.
Journal ArticleDOI
Static magnetic order and superfluid density of RFeAs(O,F) (R=La,Nd,Ce) and LaFePO studied by muon spin relaxation: unusual similarities with the behavior of cuprate superconductors.
Jeremy P. Carlo,Yasutomo J. Uemura,Tatsuo Goko,Tatsuo Goko,Tatsuo Goko,Gregory MacDougall,J. A. Rodriguez,W. Yu,Graeme Luke,Pengcheng Dai,Nic Shannon,Shigeki Miyasaka,Shinnosuke Suzuki,Setsuko Tajima,G. F. Chen,W. Z. Hu,J. L. Luo,N. L. Wang +17 more
TL;DR: Muon spin relaxation measurements in iron-oxypnictide systems have revealed commensurate long-range order in undoped LaFeAsO and scaling of the superfluid density with T_{c} in the Ce-, La-, and Nd-FeAs superconductors following a nearly linear relationship found in cuprates.